Once upon a time, shards of evil called “Devil Splinters” were scattered across space, throwing the universe into chaos. While the Ultra Heroes fight to restore peace to the galaxy, the parasitic lifeform Celebro uses these items in its despicable scheme to destroy planets one by one. In its way stands the gallant Ultraman Zero and his disciple, Ultraman Z, a new member of the InterGalactic Defense Force. At the end of a fierce battle, Z sets out in lone pursuit of the ferocious space monster Genegarg, making his way towards Earth. Meanwhile on Earth, the anti-monster robot unit STORAGE is formed to combat the recurring attacks by giant monsters. One of its new members is a young pilot named Haruki Natsukawa. Z merges with Haruki, and together they rise up to protect the peace! However, behind the scenes, Celebro has set a terrifying new plot into motion… (Source: Tsuburaya Productions)